Air Masses and High and Low Pressure

What happens to air pressure as you move upward into the atmosphere?

• increases
• decreases
• stays the same

A device that is used to measure atmospheric pressure is a ___________.

• barometer
• thermometer
• kilometer
• micrometer

Air pressure is greater _______.

• at the top of the mountain
• at the bottom of the mountain
• at the center of the mountain

Cold air is more_____ than warm air 

• Dense
• Stale
• Colorful 

A low pressure system usually causes

• Clearing Weather

• Warm and Humid Weather

• Fair Weather

A _____________ is the scientific  instrument used to measure air pressure.

• barometer
• thermometer
• mercury
• watch

What causes winds?

• differences in precipitation
• differences in humidity
• differences in air pressure

Does high air pressure systems SINK or RISE in the atmosphere?

• Sink

• Rise

Do LOW air pressure systems SINK or RISE in the atmosphere?

• Sink

• Rise

What does a barometer measure?

• Temperature

• Density

• Pressure